Typewriting machine



March 2 1926. 1,574,980

J. LINDBURG TYPEWRITING MACHINE Filed March 7, 1924 //7 van far Patented Mar. 2, 1926.

UNITED STATES PATENT OFFICE.

J)SEPH LINDBURG, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A-CORPORATION OF DELAWARE.

TYrEwRrrIne MACHINE.

Application filed March 7, 1924. Serial No. 697,477.

To all whom it may concern:

Be it known that I, Josnrrr LINDBURG, a citizen of the United States, residing in Bay Ridge, Brooklyn, in the county of Kings, city and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification. This invention relates to improvements in typewriting machines, and particularly to devices for holding cards and work-sheets to the platen.

One of the features of the invention is to provide for certain flexibility in the holder when typing papers, while reducing or eliminating flexibility when typing cards upon the platen.

Another feature of the invention is to reduce or eliminate excessive pressure of the apex of the card-holder upon comparatively stiff cards, thereby preventing said apex from disarranging the card.

Another feature is to mount the cardholding plate or guide directly onto the wing-scale, and to make said plate or guide readily attachable and detachable.

Another feature is to have the wing-scale connected to the wing-scale frame in a way that will permit endwise adjustment or 3 truing of said scale.

There is shown a card-clipping bar mounted upon and extending along the platen and revolving therewith; and a feature of the invention is to allow the platen, with the bar, to be reversely rotated. and to prevent the bar from catching upon the top edge of the wing-scale during the reverse rotation.

Other features and advantages will hereinafter appear.

In the accompanying drawings;

Figure 1 is a front view showing the wing-scale and card-holding plate in position in front of the platen.

Figure 2 is a view, partly in section, on the line 22 of Figure 1, showing fillerblocks in position between the wing-scale and the shields, also rollers in front of the shields.

Figure 3 is a detail view, partly in section, on the line 33 of Figure 1, showing the wing-scale with one of its shields, which are hereinafter described, and a bearingroller in engagement therewith, also studs on said scale for engaging the card-holder or guide.

Figure 4 is a front view of the card-holding plate or guide shown in engagement with the studs of the wingscale, sa d studs being shown in section.

Figures 5 and 6 are respectively a side view and a planof the card-holding plate or guide.

The present invention is illustrated as applied to an Underwood standard typewriting machine in which 11 designates a platen .shown in Figure 2 as supported on 13 and arms 14. The platen-frame 13 has thereunder rollers 15, by means of which it rides on the shift-rail 16 of a shift-frame 17, which is shown in Figure 2 as pivoted at 18, and is actuated by rocker-arms 19. A wing-scale 20 is shown in Figures 1, 2 and 3 as having at the lower edge thereof vertical ears or flanges 21, which are shown as connected to the corresponding vertical flanges 22 of a wing-scale frame 23 by means of screws 24-. Horizontal slots 25 in said ears or flanges 21 allow endwise adjnstn'ient of the wing-scale 20 if desired.

The main body of the wingscale 20 is rearwardly inclined towards the platen when in position on said frame and it has thereon, near the printing point of the platen. forwardly-projecting vertical shields 26, which may be formed from metal strips extending from the main-body of said scale 20, integral therewith, by bending said strips to asuitable angle until they assume the position shown in Figures 2 and 3.

The shields 26 are then more or less flexible or yielding at their ends which are remote from the bend, due to the elasticity of the material; the connection at the bend of the shields 26 with the main body of the scale 20 is, therefore, hereinafter described as fleiiible or yielding. This flexibility or a carriage 12 by means of a platen-frame yielding of the shields is advantageous when typing paper on the platen, the reaction by the platen with paper thereon to the pressure of the bearing-rolls transmitted thereto by the shields 26 and said scale 20 being comparatively small.

The shields 26 have therein runways 27 for circular flanges 28 of bearing-rolls 29 to fit therein, thereby securing said-scale 20 against lateral displacement. Saidrolls 29 are supported by the usual springbrackets 30 which are secured to the typesegment 31, as shown in Figure 1.

When typing stiff cards on the platen, the pressure of the rolls 29 on the shields 26 is transmitted to the main body the \ving-scaleQO by, vertical filler-blocks 32, which are preferably made in the form of ribs at the sides of a, card-holding plate 33, as shown inFigure 2, which ribs are pref erably integral with said plate 33 and formed by bending the sides of said plate 33 at the edges thereof forwardly substantially at right angles to the lower part said plate 33.

. The filler-blocks 32 are preferably beveled or wedge shaped in a plane substantially at right angles to said scale 29 and the lower part of said plate 33, thereby forcing the shields 26 forwardly and away from said scale 20 when pressing said plate 33 downwardly onto said scale 20, thereby insuring a comparative rigidity of connection between said scale 20 and theupper parts of the shields 26, and thereby preventing undue deflection of said shields. 26 rearwardly'under the pressure of the bearing-rolls 29. This rigidity isadvantageous because the resistance tobending of a stiff card against the platen is considerable.

The card-holding plate 33 isthereby also prevented from rattling or shaking in its seat between the front of, the wing-scale 20 and the headsof the studs 3%, which are shown in Figures 1, 3 and 4, and serve as supports for the cardholding plate 33, which has thereon notches 35 to fit the studs 3st whens-aid plate 33 is placed between the heads of the studs 3st, rearwardly thereof, and the front of, the wing-scale 20. The card-holding plate or guide 33 has thereon legs 36, which are made in one therewith, and are tapered on the outside thereof in the plane of the lower part of said plate as shown in Figures 1 and To mount the card-holding plate or guide 33 in position, the ends of the legs 36 thereof are inserted between said studs 3% and it is pushed down until said notches 35 catch upon the studs 3%.

T o prevent the card holding plate or guide 33 from being dislocated when in operation, it is provided with grooved project-ions or detents 37 at the lower ends of the legs 36 thereof, to engage forwardly-projecting ledges 38, which are formed in the lower edge of the main body of the wing-scale 20, substantially at right angles thereto.

lvlien in operation, the reaction of the platen 11 with the card thereon to the pressure of the apex 39 of said cardholding plate, 33 will tend to press the detents 37 onto said ledges 38, thereby preventing the dislocation of said plate 33.

To prevent the detents 37 from catching on the top of said. ledges 38 when the cardholding plate 33 is pressed down into position on? said scale 20, the detents are provided at the bottom thereof with forwardlyflaring extension's 40 to ride over said ledges 38, thereby slightly deflecting the legs 36 forwardly until"- the grooves in said detents 37 are brought opposite said ledges 38 when said legs 36 are' sprung back rearwardly, forcing said grooved detents 37 into engagement with said ledges 38.

To facilitate the'lifting up or pressing down of the card-holdingplate 33 when in operation, a hand-hold or finger-piece 41 is provided atthe front of the apex 39 of said plate, as shown in Figures 4, 5 and (5. The linger-piece a1 may also serve as a pointer for the printing position of a type-charactcr to be written.

The upper part of the card-holding plate 33 near the apex 39 thereof is shown in Figures l and t as of skeleton construction and having the form of an inverted V, the edges of the sides thereof being flared away, thereby rendering said plate 33 rigid at said upper part, which is curved towards the platen 11.

The area of contact of the apex 39 with cards on the platen is thereby reduced to a minimum. The apex' 39 of said plate 33 is not quite touching the platen 11 in the absence of the cardthereon, leaving a clearance therebetw een, which is smaller than the thickness of, the card, thereby causing said ape 39 to bear on the card whelrthc latter is typed on the platen, but the pressure of said apex 39 thereupon is by the above pro vision reduced to a minimum, thereby preventing said apex 39 from disarranging the card on the platen.

The wing-scale frame 20 is also shown in Figure 1 as having thereon upwardly-extending horns to prevent bar 44-. which is used for holding the leading edge of a card to the platen, from catching upon the top edge. of. said scale 20 when the platen, with said bar thereon, is being reversely retated by the operator, as isthe practice in typing cards, especially if the card is to be introduced bottom edge. first between the wing-scale andthe platl li.

Saidbar 4% is substantially the same as described in the patent to G. A. Joerissen, No. 858,655, granted July 2, 1907.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen, of a wing-scale adjacent the front thereof, said scale carrying resilient ears arranged to overlie the scale in spaced relation thereto, and pressure means engaging against said resilient ears and yieldingly pressing the scale toward the platen.

2. In a typewriting machine, the e0mbination of a platen, a carriage for supporting the same, a wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wing-scale secured to said frame, substantially vertical shields in front of said scale and flexibly connected thereto, the upper parts of the shields with said scale having spaces therebetween, runways in the shields, bearing rolls to fit the runways, thereby seeming the scale against lateral displacement, means for pressing the rolls against the shields for holding said scale to cards and paper on the platen, and a card-holding plate detaehably mounted on said scale, said plate including filler-blocks to fit said spaces, said filler-blocks to transmit the pressure from the rolls and shields directly to said scale with said plate for holding cards to the platen.

3. In a typewriting machine, the combination of a platen, a carriage for supporting the same, a wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wing-scale secured to said frame, substantially vertical shields bent up from the wing-scale to stand in front thereof, the shields being spaced from the scale, runways in the shields, bearing rolls to fit the runways, thereby securing said scale against lateral displacement, means for pressing the rolls against the shields for holding the scale to cardsand paper on the platen, and a card-holding plate dctachably mounted on said scale, said plate including fillerblocl s to fit said spaces, whereby to transmit the pressure from the rolls and shields directly to said scale with said plate for holding cards to the platen.

-;l-.. In a typewriting machine, the combination of a platen, a carriage for supporting the same, a wingscale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wing-scale secured to said frame, combined with substantially vertical shields in front of said scale, said shields being formed of strips made in one with said scale and bent to a suitable angle therewith, thereby making flexible connections of the shields with said scale, runways in the shields, bearing rolls to fit the runways, thereby securing the scale against lateral displacement, and means for pressing the rolls against the shields, thereby holding the scale to the platen.

5. In a typewriting machine, the combination of a platen, a carriage for supporting the same, a wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wing-scale secured to said frame, substantially vertical shields in front of said scale, runways in the shields, and bearing rolls to fit the runways, thereby securing said scale against lateral displacement, combined with a card-holding plate removably mounted on said scale and means for pressing the rolls against the shields, thereby holding said scale with said plate to cards on the platen.

6. In a typewriting machine, the combination of a platen, a carriage for supporting he same, a wing-scale frame in front of the platen, and means for interchangeably holdmg cards and paper to the platen, said means comprising a wing-scale secured to said I frame, substantially vertical shields in front of said scale,'runways in the shields, and bearing rolls to fit the runways, thereby securing the scale against lateral displacement, combined with studs on said scale, a card-holding plate having therein notches to engage the studs, thereby removably mounting said plate on said scale, and means for pressing the rolls against the shields, thereby holding said scale with said plate to cards on the platen.

7. In a typewriting machine, the combination of a platen, a carriage for supporting the same, a wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wing-scale secured to said frame, substantially vertical shields in front of said scale, runways in the shields, bearing rolls to fit the runways, thereby securing the scale against lateral displacement, a card-holding plate, and means for engaging said plate with said scale near the top thereof, combined with forwardly-projecting ledges at the lower edge of said scale, grooved pendants on said plate to engage said ledges, thereby removably mounting said plate on said scale, and means for pressing he rolls against the shields, thereby holding said scale with said plate to cards on the platen.

8. In a typewriting machine, the combination of a platen, a carriage for supporting the same, a wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wingscal-e secured to said frame, substantially vertical shields in front of said scale, runways in the shields,

bearing rolls to fit the run-ways, thereby securing the scale against lateral displacement, and a cand-holding plate, combined with means for removably connecting said plate 5 to said scale at points near the top and bottom thereof'and means for pressing the rolls against the shields, thereby holding; said scalewith. said plate towardson the platen.

9. In a, typewriting machine, the; combination of a platen, acarriage for supporting, the same, a wing-scale frame in front of, the platen, and means for'interchangeably holdmg cards and paper to the platen, said means: comprising a wing-scale secured to the frame, substantially vertical shields in front of, said: scale, runways in theshields, bearing rolls to lit the runways, thereby, securing said scale against lateral displacement, and a card holding plate remoyably mounted on said scale, combined with a handhold on said plate and means for pressing the rolls-against the shields,thereby holding said scale with said platevto the platen.

10. In a.typewriting,machine, the combination of a platen, acarriage for supporting the same, a wingscaleframe in front of, the platen, and means for interchangeably hold- 'ing cards and paper to the platen, said means, comprising a wing scale secured to the frame, substantially Vertical shields in front of said scale, runways in the shields, bearingroll'sto fit the rnn-ways, thereby se curing the scale against lateraldisplacement, studs on said scale, and award-holding. plate havingtherein notches to engage the studs, thereby, removably; mounting said plate on said scale, combined withlegs on said plate, saidlegs being tapered in the-planeof said plate to be. inserted between the studs and pressed into position therebetween, thereby renderingsecure the mounting of said plate on said scale, and means for pressing the rolls against the shields,- thereby holding said scale with said platetocards on the platen.

11. In a typewriting machine, the combinationavitlna platen, of airing-scale ad? jacent the front thereof, said; scale: haying pendent ears bent up to stand in front-ofthe scale, and pressure means.engag-i'ng'said ears, pressing, the scale toward the platen.

12. In a typewritingmachine, the combination of a platen, a carriage for supportingthe same, a wing-scale framecinvfront; of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a wing-scale-secured to said frame, substantially vertical shieldsin front of said scale, runways inthe shields, bearing rolls .to fit the runways, thereby securing the scale against lateral displacement, acard-holding plate, means for engaging; said-plate with said SCfllBIlBil -LfilillB top thereof, forwardly projecting.ledgeszat the lower edgeiofsaidiscale, and groovedpendants on. said plate to engage said ledges, thereby removably mounting said plate on said scale, combined with forwardly-flared extensions of said pendants to ride over said ledges when said plate is pushed down into engagement with said scale, and means for pressing the rolls against the shields, thereby holding said scale with said plate to cards on the platen.

13. Ina typewriting machine, the combination of a platen,. a carriage for supporting the same, a wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to the platen, said means comprising a: wing-scale secured to said frame, substantially vertical shields infront of the wing-scale and flexibly connected thereto, the upper partsof the shields with said scale having spaces therebetween, runways in the shields, bearing rolls to fit the runways,- therebysecuring said scale against lateral displacement, means for: pressing the rolls against the shields for holding the scale-to cards and paper on the platen, and a card holding plate detachablymounted on aid scale, said plate including, filler-blocks to fit said spaces, combined with bevels on said filler-blocks to force the shields forwardly away from said scale, thereby making a rigid connection therebetween, and said filler-blocks to transmit the pressure from the rolls and shields directly to said scale with said plate for holding cards to the platen.

Id. In a typewriting machine, the combination of a platen, a carriage forv supporting the same, a Wing-scale frame in front of the platen, and means for interchangeably holding cards and paper to, the platen, said means comprising a wing-scale secured to said frame, substantially, vertical shields connected to saidv scale, runways in the shields, bearing rollsto fit the runways, thereby securing said scale againstlateral displacement, means for pressing the rolls against the shields, thereby holding said scale to. the platen, abar on said platen to hold acarduthercon, and upwardly-extendine'horns on the upper edgerof said scale, the tips of the horns being slightly spaced from the platen, so that, upon reversely rotating'said platen, the bar engages behind the horns and causes the wing-scale to move forward sufiiciently, to permit the bar to pass;

15. In atypewu-i-ting machine, the combination with a revoluble platen, of a wingscale adjacent the front thereof, said scale including portions bent from the body thereof so as to stand in front of the scale, in spacedvrelation;thereto, a detachable cardholder arrangednto be secured to the wingscale: and having-spacers for filling in the spacebetween the wing-scale and said bent. portions, and pressure means engaging said bent portions, whereby to press the latter against the spacers and thereby press the wing-scale toward the platen.

16. In a typewriting machine, the combination with a platen, of a wing-scale having bearing members extending upward from the bottom edge of the wing-scale, so as to stand in front of said wing-scale, in spaced relation thereto, a card-holder dea tachably mounted on the wing-scale and including blocks for filling in the space between said bearing members and the body of the wing-scale, and pendent portions extending downward from the card-holder on both sides of the printing line and adjacent the blocks, said pendent portions including at their free ends means for engaging around the lower portion of the wing-scale, whereby to hold the card-holder against lifting.

'17. In a typewriting machine, the combination with a platen, of a wing-scale adjacent the front thereof, including resilient ears arranged, to overlie the wing-scale pressure means engaging said ears, whereby to press the wing-scale toward the platen, and a card-holding bar fixed to the platen, said wing-scale including upwardly-extending horns positioned substantially behind the resilient ears, the tips of the horns be ing slightly spaced from the platen, whereby, upon reversely turning the platen, the card-holding bar engages behind said horns and pushes the wing-scale forward directly against the action of said pressure means, sufficiently to allow the bar to pass.

18. In a typewriting machine, the com bination with a platen, of a wing-scale, means for pressing the wing-scale toward the platen, and a cardholder detachably mounted on said wing-scale, including a finger-piece vertically above the printing line, whereby said card holder may be grasp-ed for attaching or removing from the scale, and the finger-piece serves as a pointer for indicating the writing position of a type-character to be written.

19. In a typewriting machine, the combination with a platen, of a wing-scale adjacent the front thereof, and including endent portions bent up to overlie the wing-scale, the bent-up portions being spaced from said wing-scale, a detachable card-holder including spacers for filling in the space between the bent-up portions and the wingscale, said spacers being wedge-shaped, whereby to facilitate entry, and pressure means engaging the bent-up portions, hereby to transmit pressure through said spacers to the wing-scale.

20. In a typewriting machine, the combination with a revoluble platen shiftable into upper and lower case-positions, and a floatin scale-frame movable up and down wi h th pla en; a e rtt i lcler tied. 9e

the platen, a resilient wing-scale secured at its lower edge to the scale-frame to permit passage of the card-holder as the platen is rotated, spring shields formed on the lower edge of the scale to extend over the face thereof, means for guiding the shields and for pressing them towards the platen, and a bowed-spring card-guide engageable on the face of the wing-scale interjacent the shields.

21. In a typewriting machine, the combination with a revoluble platen shiftable into upper and lower case-positions, and a floating scale-frame movable up and down with the platen, of a card-holder fixed on the platen, a resilient wing-scale secured at its lower 6( ge to the scale-frame to permit passage of the card-holder as the platen is rotated, spring shields formed on the lower edge of the scale toextend over the face thereof, means for guiding the shields and for pressing them towards the platen, a pair of button-headed studs fixed in the face of the scale near its upper edge, a bow-shaped card-guide curved to clear the platen and having pads at its branches disposable on the scale, said pads presenting side and. bot tom extensions to engage at their junctions with the studs whereby the card-guide is removably held in place on the scale, and means on the ends of the side extensions to make contact with the shields.

22. In a typewriting machine, the com bination with a revoluble platen shiftable into upper and lower case-positions, and a floating scale-frame movable up and down with the platen, of a cardholder fixed on the platen, a resilient wing-scale secured at its lower edge to the scale-frame. to permit passage of the card-holder as the platen is rotated, spring shields formed on the lower edge of the scale to extend over the face thereof, means for guiding the shields and for pressing them towards the platen, a pair of button-headed studs fixed in the face of the scale near its upper eege, a bow-shaped card-guide curved to clear the platen and having pads atits branches disposable on the scale, said pads presenting side and bottom extensions to engage at their junctions with the studs whereby the card-guide is removably held in place on the scale, and means on the ends of the bottom extensions to engage the lower edge of the scale.

23. In a typewriting machine, the co1nbination with a revoluble platen shiftable into upper and lower case-positions, and a floatin scale-frame movable up and down with the platen, of a card-holder fixed on the platen, a resilient wing-scale secured at its loweredge to the scale-frame to permit passage of the card-holder as the platen is rotated. spring shields formed on the lower edge of the scale to extend over the face ther iiiieaas fe gui i g the shi lds and.

for pressing them towards the platen 11- pair of button-headed studs fixed in the face of the scale near its upper edge, a bow-shaped card-guide curved to clear the platen and having pads at its branches disposable on the scale, said pads presenting side and bottom extensions to engage at their junctions with the studs whereby the card-guide is reinovably held in place on the scale said side extensions being bent -fol-ward to con- 10 tact with the rear surface of the spring shields, and detents formed on the lower edges of the bottom extensions to engage below the lower edge of the scale.

JOSEPH LINDBURG. 

